Carsunum

Carsunum, also known as black spice, was a rare and highly illegal spice variant mined on Sevarcos II. It was hard to find, usually located deep within mines under layers of solid rock.

Controversial legends said that carsunum aided in meditation, granting insight, as well as improved health and longevity. In reality, use of carsunum granted a temporary boost of both mental and physical abilities as well as a pleasurable sense of well-being; however, once the spice hit ended, the user lost their mood and energy, and sometimes ended up poisoned, even with fatal results.

The mysterious Healer's Guild used a forgotten recipe of carsunum (sometimes mixed with ryll) to control and prevent the proliferation of hive viruses like the one that infected the crew of the Katana fleet.

Because of its dangerous effects, carsunum was illegal, and also rare. A dose of 10 grams costed a thousand Imperial Credits in the black market.

Text and facts from the “Carsunum/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.